// CreateFrame() is used for both simple and animated images
void nsPNGDecoder::CreateFrame(png_uint_32 x_offset, png_uint_32 y_offset,
PRInt32 width, PRInt32 height,
gfxASurface::gfxImageFormat format)
{
PRUint32 imageDataLength;
nsresult rv = mImage->EnsureFrame(GetFrameCount(), x_offset, y_offset,
width, height, format,
&mImageData, &imageDataLength);
if (NS_FAILED(rv))
longjmp(png_jmpbuf(mPNG), 5); // NS_ERROR_OUT_OF_MEMORY
mFrameRect.x = x_offset;
mFrameRect.y = y_offset;
mFrameRect.width = width;
mFrameRect.height = height;
#ifdef PNG_APNG_SUPPORTED
if (png_get_valid(mPNG, mInfo, PNG_INFO_acTL))
SetAnimFrameInfo();
#endif
// Tell the superclass we're starting a frame
PostFrameStart();
PR_LOG(gPNGDecoderAccountingLog, PR_LOG_DEBUG,
("PNGDecoderAccounting: nsPNGDecoder::CreateFrame -- created "
"image frame with %dx%d pixels in container %p",
width, height,
mImage.get ()));
mFrameHasNoAlpha = PR_TRUE;
}
nsresult
Decoder::AllocateFrame()
{
MOZ_ASSERT(mNeedsNewFrame);
MOZ_ASSERT(NS_IsMainThread());
MarkFrameDirty();
nsresult rv;
if (mNewFrameData.mPaletteDepth) {
rv = mImage.EnsureFrame(mNewFrameData.mFrameNum, mNewFrameData.mOffsetX,
mNewFrameData.mOffsetY, mNewFrameData.mWidth,
mNewFrameData.mHeight, mNewFrameData.mFormat,
mNewFrameData.mPaletteDepth,
&mImageData, &mImageDataLength,
&mColormap, &mColormapSize, &mCurrentFrame);
} else {
rv = mImage.EnsureFrame(mNewFrameData.mFrameNum, mNewFrameData.mOffsetX,
mNewFrameData.mOffsetY, mNewFrameData.mWidth,
mNewFrameData.mHeight, mNewFrameData.mFormat,
&mImageData, &mImageDataLength, &mCurrentFrame);
}
if (NS_SUCCEEDED(rv) && mNewFrameData.mFrameNum == mFrameCount) {
PostFrameStart();
} else if (NS_FAILED(rv)) {
PostDataError();
}
// Mark ourselves as not needing another frame before talking to anyone else
// so they can tell us if they need yet another.
mNeedsNewFrame = false;
return rv;
}
//******************************************************************************
nsresult nsGIFDecoder2::BeginImageFrame(uint16_t aDepth)
{
uint32_t imageDataLength;
nsresult rv;
gfxASurface::gfxImageFormat format;
if (mGIFStruct.is_transparent)
format = gfxASurface::ImageFormatARGB32;
else
format = gfxASurface::ImageFormatRGB24;
// Use correct format, RGB for first frame, PAL for following frames
// and include transparency to allow for optimization of opaque images
if (mGIFStruct.images_decoded) {
// Image data is stored with original depth and palette
rv = mImage.EnsureFrame(mGIFStruct.images_decoded,
mGIFStruct.x_offset, mGIFStruct.y_offset,
mGIFStruct.width, mGIFStruct.height,
format, aDepth, &mImageData, &imageDataLength,
&mColormap, &mColormapSize);
// While EnsureFrame can reuse frames, we unconditionally increment
// mGIFStruct.images_decoded when we're done with a frame, so we both can
// and need to zero out the colormap and image data after every call to
// EnsureFrame.
if (NS_SUCCEEDED(rv) && mColormap) {
memset(mColormap, 0, mColormapSize);
}
} else {
// Regardless of depth of input, image is decoded into 24bit RGB
rv = mImage.EnsureFrame(mGIFStruct.images_decoded,
mGIFStruct.x_offset, mGIFStruct.y_offset,
mGIFStruct.width, mGIFStruct.height,
format, &mImageData, &imageDataLength);
}
if (NS_FAILED(rv))
return rv;
memset(mImageData, 0, imageDataLength);
mImage.SetFrameDisposalMethod(mGIFStruct.images_decoded,
mGIFStruct.disposal_method);
// Tell the superclass we're starting a frame
PostFrameStart();
if (!mGIFStruct.images_decoded) {
// Send a onetime invalidation for the first frame if it has a y-axis offset.
// Otherwise, the area may never be refreshed and the placeholder will remain
// on the screen. (Bug 37589)
if (mGIFStruct.y_offset > 0) {
nsIntRect r(0, 0, mGIFStruct.screen_width, mGIFStruct.y_offset);
PostInvalidation(r);
}
}
mCurrentFrame = mGIFStruct.images_decoded;
return NS_OK;
}
//******************************************************************************
nsresult nsGIFDecoder2::BeginImageFrame(gfx_depth aDepth)
{
PRUint32 imageDataLength;
nsresult rv;
gfxASurface::gfxImageFormat format;
if (mGIFStruct.is_transparent)
format = gfxASurface::ImageFormatARGB32;
else
format = gfxASurface::ImageFormatRGB24;
// Use correct format, RGB for first frame, PAL for following frames
// and include transparency to allow for optimization of opaque images
if (mGIFStruct.images_decoded) {
// Image data is stored with original depth and palette
rv = mImage->AppendPalettedFrame(mGIFStruct.x_offset, mGIFStruct.y_offset,
mGIFStruct.width, mGIFStruct.height,
format, aDepth, &mImageData, &imageDataLength,
&mColormap, &mColormapSize);
} else {
// Regardless of depth of input, image is decoded into 24bit RGB
rv = mImage->AppendFrame(mGIFStruct.x_offset, mGIFStruct.y_offset,
mGIFStruct.width, mGIFStruct.height,
format, &mImageData, &imageDataLength);
}
if (NS_FAILED(rv))
return rv;
mImage->SetFrameDisposalMethod(mGIFStruct.images_decoded,
mGIFStruct.disposal_method);
// Tell the superclass we're starting a frame
PostFrameStart();
if (!mGIFStruct.images_decoded) {
// Send a onetime invalidation for the first frame if it has a y-axis offset.
// Otherwise, the area may never be refreshed and the placeholder will remain
// on the screen. (Bug 37589)
if (mGIFStruct.y_offset > 0) {
PRInt32 imgWidth;
mImage->GetWidth(&imgWidth);
nsIntRect r(0, 0, imgWidth, mGIFStruct.y_offset);
PostInvalidation(r);
}
}
mCurrentFrame = mGIFStruct.images_decoded;
return NS_OK;
}
// Initializes a decoder whose image and observer is already being used by a
// parent decoder
void
Decoder::InitSharedDecoder(uint8_t* imageData, uint32_t imageDataLength,
uint32_t* colormap, uint32_t colormapSize,
imgFrame* currentFrame)
{
// No re-initializing
NS_ABORT_IF_FALSE(!mInitialized, "Can't re-initialize a decoder!");
NS_ABORT_IF_FALSE(mObserver, "Need an observer!");
mImageData = imageData;
mImageDataLength = imageDataLength;
mColormap = colormap;
mColormapSize = colormapSize;
mCurrentFrame = currentFrame;
// We have all the frame data, so we've started the frame.
if (!IsSizeDecode()) {
PostFrameStart();
}
// Implementation-specific initialization
InitInternal();
mInitialized = true;
}
// Initializes a decoder whose image and observer is already being used by a
// parent decoder
void
Decoder::InitSharedDecoder(uint8_t* aImageData, uint32_t aImageDataLength,
uint32_t* aColormap, uint32_t aColormapSize,
RawAccessFrameRef&& aFrameRef)
{
// No re-initializing
NS_ABORT_IF_FALSE(!mInitialized, "Can't re-initialize a decoder!");
mImageData = aImageData;
mImageDataLength = aImageDataLength;
mColormap = aColormap;
mColormapSize = aColormapSize;
mCurrentFrame = Move(aFrameRef);
// We have all the frame data, so we've started the frame.
if (!IsSizeDecode()) {
PostFrameStart();
}
// Implementation-specific initialization
InitInternal();
mInitialized = true;
}
nsresult
Decoder::AllocateFrame()
{
MOZ_ASSERT(mNeedsNewFrame);
MOZ_ASSERT(NS_IsMainThread());
mCurrentFrame = mImage.EnsureFrame(mNewFrameData.mFrameNum,
mNewFrameData.mFrameRect,
mDecodeFlags,
mNewFrameData.mFormat,
mNewFrameData.mPaletteDepth,
mCurrentFrame.get());
if (mCurrentFrame) {
// Gather the raw pointers the decoders will use.
mCurrentFrame->GetImageData(&mImageData, &mImageDataLength);
mCurrentFrame->GetPaletteData(&mColormap, &mColormapSize);
if (mNewFrameData.mFrameNum == mFrameCount) {
PostFrameStart();
}
} else {
PostDataError();
}
// Mark ourselves as not needing another frame before talking to anyone else
// so they can tell us if they need yet another.
mNeedsNewFrame = false;
// If we've received any data at all, we may have pending data that needs to
// be flushed now that we have a frame to decode into.
if (mBytesDecoded > 0) {
mNeedsToFlushData = true;
}
return mCurrentFrame ? NS_OK : NS_ERROR_FAILURE;
}
void
nsIconDecoder::WriteInternal(const char *aBuffer, PRUint32 aCount)
{
NS_ABORT_IF_FALSE(!HasError(), "Shouldn't call WriteInternal after error!");
// We put this here to avoid errors about crossing initialization with case
// jumps on linux.
PRUint32 bytesToRead = 0;
nsresult rv;
// Performance isn't critical here, so our update rectangle is
// always the full icon
nsIntRect r(0, 0, mWidth, mHeight);
// Loop until the input data is gone
while (aCount > 0) {
switch (mState) {
case iconStateStart:
// Grab the width
mWidth = (PRUint8)*aBuffer;
// Book Keeping
aBuffer++;
aCount--;
mState = iconStateHaveHeight;
break;
case iconStateHaveHeight:
// Grab the Height
mHeight = (PRUint8)*aBuffer;
// Post our size to the superclass
PostSize(mWidth, mHeight);
if (HasError()) {
// Setting the size led to an error.
mState = iconStateFinished;
return;
}
// If We're doing a size decode, we're done
if (IsSizeDecode()) {
mState = iconStateFinished;
break;
}
// Add the frame and signal
rv = mImage.EnsureFrame(0, 0, 0, mWidth, mHeight,
gfxASurface::ImageFormatARGB32,
&mImageData, &mPixBytesTotal);
if (NS_FAILED(rv)) {
PostDecoderError(rv);
return;
}
// Tell the superclass we're starting a frame
PostFrameStart();
// Book Keeping
aBuffer++;
aCount--;
mState = iconStateReadPixels;
break;
case iconStateReadPixels:
// How many bytes are we reading?
bytesToRead = NS_MIN(aCount, mPixBytesTotal - mPixBytesRead);
// Copy the bytes
memcpy(mImageData + mPixBytesRead, aBuffer, bytesToRead);
// Invalidate
PostInvalidation(r);
// Book Keeping
aBuffer += bytesToRead;
aCount -= bytesToRead;
mPixBytesRead += bytesToRead;
// If we've got all the pixel bytes, we're finished
if (mPixBytesRead == mPixBytesTotal) {
PostFrameStop();
PostDecodeDone();
mState = iconStateFinished;
}
break;
case iconStateFinished:
// Consume all excess data silently
aCount = 0;
break;
}
}
}
void
nsJPEGDecoder::WriteInternal(const char *aBuffer, uint32_t aCount)
{
mSegment = (const JOCTET *)aBuffer;
mSegmentLen = aCount;
NS_ABORT_IF_FALSE(!HasError(), "Shouldn't call WriteInternal after error!");
/* Return here if there is a fatal error within libjpeg. */
nsresult error_code;
// This cast to nsresult makes sense because setjmp() returns whatever we
// passed to longjmp(), which was actually an nsresult.
if ((error_code = (nsresult)setjmp(mErr.setjmp_buffer)) != NS_OK) {
if (error_code == NS_ERROR_FAILURE) {
PostDataError();
/* Error due to corrupt stream - return NS_OK and consume silently
so that libpr0n doesn't throw away a partial image load */
mState = JPEG_SINK_NON_JPEG_TRAILER;
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (setjmp returned NS_ERROR_FAILURE)"));
return;
} else {
/* Error due to reasons external to the stream (probably out of
memory) - let libpr0n attempt to clean up, even though
mozilla is seconds away from falling flat on its face. */
PostDecoderError(error_code);
mState = JPEG_ERROR;
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (setjmp returned an error)"));
return;
}
}
PR_LOG(gJPEGlog, PR_LOG_DEBUG,
("[this=%p] nsJPEGDecoder::Write -- processing JPEG data\n", this));
switch (mState) {
case JPEG_HEADER:
{
LOG_SCOPE(gJPEGlog, "nsJPEGDecoder::Write -- entering JPEG_HEADER case");
/* Step 3: read file parameters with jpeg_read_header() */
if (jpeg_read_header(&mInfo, TRUE) == JPEG_SUSPENDED) {
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (JPEG_SUSPENDED)"));
return; /* I/O suspension */
}
// Post our size to the superclass
PostSize(mInfo.image_width, mInfo.image_height);
if (HasError()) {
// Setting the size led to an error.
mState = JPEG_ERROR;
return;
}
/* If we're doing a size decode, we're done. */
if (IsSizeDecode())
return;
/* We're doing a full decode. */
if (mCMSMode != eCMSMode_Off &&
(mInProfile = GetICCProfile(mInfo)) != nullptr) {
uint32_t profileSpace = qcms_profile_get_color_space(mInProfile);
bool mismatch = false;
#ifdef DEBUG_tor
fprintf(stderr, "JPEG profileSpace: 0x%08X\n", profileSpace);
#endif
switch (mInfo.jpeg_color_space) {
case JCS_GRAYSCALE:
if (profileSpace == icSigRgbData)
mInfo.out_color_space = JCS_RGB;
else if (profileSpace != icSigGrayData)
mismatch = true;
break;
case JCS_RGB:
if (profileSpace != icSigRgbData)
mismatch = true;
break;
case JCS_YCbCr:
if (profileSpace == icSigRgbData)
mInfo.out_color_space = JCS_RGB;
else
// qcms doesn't support ycbcr
mismatch = true;
break;
case JCS_CMYK:
case JCS_YCCK:
// qcms doesn't support cmyk
mismatch = true;
break;
default:
mState = JPEG_ERROR;
PostDataError();
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (unknown colorpsace (1))"));
return;
}
if (!mismatch) {
qcms_data_type type;
switch (mInfo.out_color_space) {
case JCS_GRAYSCALE:
type = QCMS_DATA_GRAY_8;
break;
case JCS_RGB:
type = QCMS_DATA_RGB_8;
break;
default:
mState = JPEG_ERROR;
PostDataError();
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (unknown colorpsace (2))"));
return;
}
#if 0
/* We don't currently support CMYK profiles. The following
* code dealt with lcms types. Add something like this
* back when we gain support for CMYK.
*/
/* Adobe Photoshop writes YCCK/CMYK files with inverted data */
if (mInfo.out_color_space == JCS_CMYK)
type |= FLAVOR_SH(mInfo.saw_Adobe_marker ? 1 : 0);
#endif
if (gfxPlatform::GetCMSOutputProfile()) {
/* Calculate rendering intent. */
int intent = gfxPlatform::GetRenderingIntent();
if (intent == -1)
intent = qcms_profile_get_rendering_intent(mInProfile);
/* Create the color management transform. */
mTransform = qcms_transform_create(mInProfile,
type,
gfxPlatform::GetCMSOutputProfile(),
QCMS_DATA_RGB_8,
(qcms_intent)intent);
}
} else {
#ifdef DEBUG_tor
fprintf(stderr, "ICM profile colorspace mismatch\n");
#endif
}
}
if (!mTransform) {
switch (mInfo.jpeg_color_space) {
case JCS_GRAYSCALE:
case JCS_RGB:
case JCS_YCbCr:
mInfo.out_color_space = JCS_RGB;
break;
case JCS_CMYK:
case JCS_YCCK:
/* libjpeg can convert from YCCK to CMYK, but not to RGB */
mInfo.out_color_space = JCS_CMYK;
break;
default:
mState = JPEG_ERROR;
PostDataError();
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (unknown colorpsace (3))"));
return;
break;
}
}
/*
* Don't allocate a giant and superfluous memory buffer
* when the image is a sequential JPEG.
*/
mInfo.buffered_image = jpeg_has_multiple_scans(&mInfo);
/* Used to set up image size so arrays can be allocated */
jpeg_calc_output_dimensions(&mInfo);
uint32_t imagelength;
if (NS_FAILED(mImage.EnsureFrame(0, 0, 0, mInfo.image_width, mInfo.image_height,
gfxASurface::ImageFormatRGB24,
&mImageData, &imagelength))) {
mState = JPEG_ERROR;
PostDecoderError(NS_ERROR_OUT_OF_MEMORY);
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (could not initialize image frame)"));
return;
}
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
(" JPEGDecoderAccounting: nsJPEGDecoder::Write -- created image frame with %ux%u pixels",
mInfo.image_width, mInfo.image_height));
// Tell the superclass we're starting a frame
PostFrameStart();
mState = JPEG_START_DECOMPRESS;
}
case JPEG_START_DECOMPRESS:
{
LOG_SCOPE(gJPEGlog, "nsJPEGDecoder::Write -- entering JPEG_START_DECOMPRESS case");
/* Step 4: set parameters for decompression */
/* FIXME -- Should reset dct_method and dither mode
* for final pass of progressive JPEG
*/
mInfo.dct_method = JDCT_ISLOW;
mInfo.dither_mode = JDITHER_FS;
mInfo.do_fancy_upsampling = TRUE;
mInfo.enable_2pass_quant = FALSE;
mInfo.do_block_smoothing = TRUE;
/* Step 5: Start decompressor */
if (jpeg_start_decompress(&mInfo) == FALSE) {
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (I/O suspension after jpeg_start_decompress())"));
return; /* I/O suspension */
}
/* Force to use our YCbCr to Packed RGB converter when possible */
if (!mTransform && (mCMSMode != eCMSMode_All) &&
mInfo.jpeg_color_space == JCS_YCbCr && mInfo.out_color_space == JCS_RGB) {
/* Special case for the most common case: transform from YCbCr direct into packed ARGB */
mInfo.out_color_components = 4; /* Packed ARGB pixels are always 4 bytes...*/
mInfo.cconvert->color_convert = ycc_rgb_convert_argb;
}
/* If this is a progressive JPEG ... */
mState = mInfo.buffered_image ? JPEG_DECOMPRESS_PROGRESSIVE : JPEG_DECOMPRESS_SEQUENTIAL;
}
case JPEG_DECOMPRESS_SEQUENTIAL:
{
if (mState == JPEG_DECOMPRESS_SEQUENTIAL)
{
LOG_SCOPE(gJPEGlog, "nsJPEGDecoder::Write -- JPEG_DECOMPRESS_SEQUENTIAL case");
bool suspend;
OutputScanlines(&suspend);
if (suspend) {
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (I/O suspension after OutputScanlines() - SEQUENTIAL)"));
return; /* I/O suspension */
}
/* If we've completed image output ... */
NS_ASSERTION(mInfo.output_scanline == mInfo.output_height, "We didn't process all of the data!");
mState = JPEG_DONE;
}
}
case JPEG_DECOMPRESS_PROGRESSIVE:
{
if (mState == JPEG_DECOMPRESS_PROGRESSIVE)
{
LOG_SCOPE(gJPEGlog, "nsJPEGDecoder::Write -- JPEG_DECOMPRESS_PROGRESSIVE case");
int status;
do {
status = jpeg_consume_input(&mInfo);
} while ((status != JPEG_SUSPENDED) &&
(status != JPEG_REACHED_EOI));
for (;;) {
if (mInfo.output_scanline == 0) {
int scan = mInfo.input_scan_number;
/* if we haven't displayed anything yet (output_scan_number==0)
and we have enough data for a complete scan, force output
of the last full scan */
if ((mInfo.output_scan_number == 0) &&
(scan > 1) &&
(status != JPEG_REACHED_EOI))
scan--;
if (!jpeg_start_output(&mInfo, scan)) {
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (I/O suspension after jpeg_start_output() - PROGRESSIVE)"));
return; /* I/O suspension */
}
}
if (mInfo.output_scanline == 0xffffff)
mInfo.output_scanline = 0;
bool suspend;
OutputScanlines(&suspend);
if (suspend) {
if (mInfo.output_scanline == 0) {
/* didn't manage to read any lines - flag so we don't call
jpeg_start_output() multiple times for the same scan */
mInfo.output_scanline = 0xffffff;
}
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (I/O suspension after OutputScanlines() - PROGRESSIVE)"));
return; /* I/O suspension */
}
if (mInfo.output_scanline == mInfo.output_height)
{
if (!jpeg_finish_output(&mInfo)) {
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (I/O suspension after jpeg_finish_output() - PROGRESSIVE)"));
return; /* I/O suspension */
}
if (jpeg_input_complete(&mInfo) &&
(mInfo.input_scan_number == mInfo.output_scan_number))
break;
mInfo.output_scanline = 0;
}
}
mState = JPEG_DONE;
}
}
case JPEG_DONE:
{
LOG_SCOPE(gJPEGlog, "nsJPEGDecoder::ProcessData -- entering JPEG_DONE case");
/* Step 7: Finish decompression */
if (jpeg_finish_decompress(&mInfo) == FALSE) {
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (I/O suspension after jpeg_finish_decompress() - DONE)"));
return; /* I/O suspension */
}
mState = JPEG_SINK_NON_JPEG_TRAILER;
/* we're done dude */
break;
}
case JPEG_SINK_NON_JPEG_TRAILER:
PR_LOG(gJPEGlog, PR_LOG_DEBUG,
("[this=%p] nsJPEGDecoder::ProcessData -- entering JPEG_SINK_NON_JPEG_TRAILER case\n", this));
break;
case JPEG_ERROR:
NS_ABORT_IF_FALSE(0, "Should always return immediately after error and not re-enter decoder");
}
PR_LOG(gJPEGDecoderAccountingLog, PR_LOG_DEBUG,
("} (end of function)"));
return;
}
nsresult
nsIconDecoder::WriteInternal(const char *aBuffer, PRUint32 aCount)
{
nsresult rv;
// We put this here to avoid errors about crossing initialization with case
// jumps on linux.
PRUint32 bytesToRead = 0;
// Performance isn't critical here, so our update rectangle is
// always the full icon
nsIntRect r(0, 0, mWidth, mHeight);
// Loop until the input data is gone
while (aCount > 0) {
switch (mState) {
case iconStateStart:
// Grab the width
mWidth = (PRUint8)*aBuffer;
// Book Keeping
aBuffer++;
aCount--;
mState = iconStateHaveHeight;
break;
case iconStateHaveHeight:
// Grab the Height
mHeight = (PRUint8)*aBuffer;
// Post our size to the superclass
PostSize(mWidth, mHeight);
// If We're doing a size decode, we're done
if (IsSizeDecode()) {
mState = iconStateFinished;
break;
}
// Add the frame and signal
rv = mImage->AppendFrame(0, 0, mWidth, mHeight,
gfxASurface::ImageFormatARGB32,
&mImageData, &mPixBytesTotal);
if (NS_FAILED(rv)) {
mState = iconStateError;
return rv;
}
// Tell the superclass we're starting a frame
PostFrameStart();
// Book Keeping
aBuffer++;
aCount--;
mState = iconStateReadPixels;
break;
case iconStateReadPixels:
// How many bytes are we reading?
bytesToRead = PR_MIN(aCount, mPixBytesTotal - mPixBytesRead);
// Copy the bytes
memcpy(mImageData + mPixBytesRead, aBuffer, bytesToRead);
// Invalidate
PostInvalidation(r);
// Book Keeping
aBuffer += bytesToRead;
aCount -= bytesToRead;
mPixBytesRead += bytesToRead;
// If we've got all the pixel bytes, we're finished
if (mPixBytesRead == mPixBytesTotal) {
NotifyDone(/* aSuccess = */ PR_TRUE);
mState = iconStateFinished;
}
break;
case iconStateFinished:
// Consume all excess data silently
aCount = 0;
break;
case iconStateError:
return NS_IMAGELIB_ERROR_FAILURE;
break;
}
}
return NS_OK;
}
